Canister insert



FIG. 1 is a front elevation view showing our new design for a canister insert;

FIG. 2 is a back elevation view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a side elevation view thereof;

FIG. 6 is a side elevation view thereof; and,

FIG. 7 is a perspective view thereof.

The purpose of broken lines in FIG. 3 and in FIG. 4 is to illustrate environmental structures that form no part of the design to be patented. 

CLAIM The ornamental design for a canister insert, as shown and described. 